Enhanced vehicle communications

Abstract

This disclosure describes systems, methods, and devices related to vehicle communications using the 5.9 GHz frequency band. A vehicle device may select a first communication channel in a first portion of a 5.9 GHz frequency band, the first portion allocated for Wi-Fi communications, and may select a second communication channel in a second portion of the 5.9 GHz frequency band, the second portion allocated for vehicle communications. The vehicle device may generate a first physical layer (PHY) protocol data unit (PPDU) and generate a second PPDU having a different format than the first PPDU. The vehicle device may send, to a second device, the first PPDU and the second PPDU at a same time using a bonded communication channel including the first communication channel and the second communication channel.

What is claimed is: 
     
         1 . A vehicle device, the vehicle device comprising processing circuitry coupled to storage, the processing circuitry configured to:
 select a first communication channel in a first portion of a 5.9 GHz frequency band, the first portion allocated for Wi-Fi communications;   select a second communication channel in a second portion of the 5.9 GHz frequency band, the second portion allocated for vehicle communications;   generate a first physical layer (PHY) protocol data unit (PPDU);   generate a second PPDU having a different format than the first PPDU;   send, to a second device, the first PPDU and the second PPDU at a same time using a bonded communication channel comprising the first communication channel and the second communication channel.   
     
     
         2 . The vehicle device of  claim 1 , wherein the first portion is between 5.725 GHz and 5.895 GHz of the 0.9 GHz frequency band, and wherein the second portion is between 5.895 GHz and 5.925 GHz of the 5.9 GHz frequency band. 
     
     
         3 . The vehicle device of  claim 1 , wherein the first portion comprising 20 MHz of the 5.9 GHz frequency band, and the second portion being smaller than the first portion. 
     
     
         4 . The vehicle device of  claim 1 , wherein the first PPDU comprises a first medium access layer (MAC) payload, wherein the second PPDU comprises a second MAC payload different than the first MAC payload. 
     
     
         5 . The vehicle device of  claim 1 , wherein the first PPDU comprises two orthogonal frequency-division multiplexing (OFDM) symbols each using 20 MHz and having duration of four microseconds, wherein the second PPDU comprises an OFDM symbol using 10 MHz and having a duration of four microseconds, wherein the OFDM symbol at least partially overlaps the two OFDM symbols in time. 
     
     
         6 . The vehicle device of  claim 1 , wherein the processing circuitry is further configured to:
 select a primary communication channel comprising the first communication channel or the second communication channel;   select a secondary communication channel comprising the first communication channel or the second communication channel, the primary communication channel different than the secondary communication channel;   determine that a first energy level of the primary communication channel exceeds a threshold energy level;   after a backoff time period beginning after determining that the first energy level of the primary communication channel exceeds the threshold energy level, determine that a second energy level of the primary communication channel is below the threshold energy level;   identify a transmission opportunity (TxOP) using the primary communication channel based on the determination that the second energy level of the primary communication channel is below the threshold energy level;   determine that a third energy level of the secondary communication channel is below the threshold energy level before the TxOP; and   access the primary communication channel and the secondary communication channel during the TxOP.   
     
     
         7 . The vehicle device of  claim 1 , wherein the processing circuitry is further configured to:
 set, based on a negotiation between the vehicle device and the second device, a first service period during which the vehicle device and the second device are to access the first communication channel and not access the second communication channel;   set, based on the negotiation, a second service period during which the vehicle device and the second device are to access the second communication channel and not access the first communication channel;   send a third PPDU during the first service period; and   send a fourth PPDU during the second service period.   
     
     
         8 . The vehicle device of  claim 1 , wherein the processing circuitry is further configured to:
 set, based on a negotiation between the vehicle device and the second device, a service period during which the vehicle device and the second device are to access the first communication channel and access the second communication channel;   send a third PPDU during the service period; and   send a fourth PPDU during the service period.   
     
     
         9 . The vehicle device of  claim 1 , further comprising a transceiver configured to transmit and receive wireless signals comprising the first PPDU and the second PPDU. 
     
     
         10 . The vehicle device of  claim 9 , further comprising an antenna coupled to the transceiver to cause to send the first PPDU and the second PPDU. 
     
     
         11 . A non-transitory computer-readable medium storing computer-executable instructions which when executed by one or more processors result in performing operations comprising:
 selecting, by a vehicle device, a first communication channel in a first portion of a 5.9 GHz frequency band, the first portion allocated for Wi-Fi communications;   selecting, by the vehicle device, a second communication channel in a second portion of the 5.9 GHz frequency band, the second portion allocated for vehicle communications;   generating, by the vehicle device, a first physical layer (PHY) protocol data unit (PPDU);   generating, by the vehicle device, a second PPDU having a different format than the first PPDU;   sending, by the vehicle device, to a second device, the first PPDU and the second PPDU at a same time using a bonded communication channel comprising the first communication channel and the second communication channel.   
     
     
         12 . The non-transitory computer-readable medium of  claim 11 , wherein the first PPDU comprises a first medium access layer (MAC) payload, wherein the second PPDU comprises a second MAC payload different than the first MAC payload. 
     
     
         13 . The non-transitory computer-readable medium of  claim 11 , wherein the first PPDU comprises two orthogonal frequency-division multiplexing (OFDM) symbols each using 20 MHz and having duration of four microseconds, wherein the second PPDU comprises an OFDM symbol using 10 MHz and having a duration of four microseconds, wherein the OFDM symbol at least partially overlaps the two OFDM symbols in time. 
     
     
         14 . The non-transitory computer-readable medium of  claim 11 , the operations further comprising:
 selecting a primary communication channel comprising the first communication channel or the second communication channel;   selecting a secondary communication channel comprising the first communication channel or the second communication channel, the primary communication channel different than the secondary communication channel;   determining that a first energy level of the primary communication channel exceeds a threshold energy level;   after a backoff time period beginning after determining that the first energy level of the primary communication channel exceeds the threshold energy level, determining that a second energy level of the primary communication channel is below the threshold energy level;   identifying a transmission opportunity (TxOP) using the primary communication channel based on the determination that the second energy level of the primary communication channel is below the threshold energy level;   determining that a third energy level of the secondary communication channel is below the threshold energy level before the TxOP; and   accessing the primary communication channel and the secondary communication channel during the TxOP.   
     
     
         15 . The non-transitory computer-readable medium of  claim 11 , the operations further comprising:
 setting, based on a negotiation between the vehicle device and the second device, a first service period during which the vehicle device and the second device are to access the first communication channel and not access the second communication channel;   setting, based on the negotiation, a second service period during which the vehicle device and the second device are to access the second communication channel and not access the first communication channel;   sending a third PPDU during the first service period; and   sending a fourth PPDU during the second service period.   
     
     
         16 . The non-transitory computer-readable medium of  claim 11 , the operations further comprising:
 setting, based on a negotiation between the vehicle device and the second device, a service period during which the vehicle device and the second device are to access the first communication channel and access the second communication channel;   sending a third PPDU during the service period; and   sending a fourth PPDU during the service period.   
     
     
         17 . A method comprising:
 selecting, by a vehicle device, a first communication channel in a first portion of a 5.9 GHz frequency band, the first portion allocated for Wi-Fi communications;   selecting, by the vehicle device, a second communication channel in a second portion of the 5.9 GHz frequency band, the second portion allocated for vehicle communications;   generating, by the vehicle device, a first physical layer (PHY) protocol data unit (PPDU);   generating, by the vehicle device, a second PPDU having a different format than the first PPDU;   sending, by the vehicle device, to a second device, the first PPDU and the second PPDU at a same time using a bonded communication channel comprising the first communication channel and the second communication channel.   
     
     
         18 . The method of  claim 17 , wherein the first PPDU comprises two orthogonal frequency-division multiplexing (OFDM) symbols each using 20 MHz and having duration of four microseconds, wherein the second PPDU comprises an OFDM symbol using 10 MHz and having a duration of four microseconds, wherein the OFDM symbol at least partially overlaps the two OFDM symbols in time. 
     
     
         19 . The method of  claim 17 , further comprising:
 selecting a primary communication channel comprising the first communication channel or the second communication channel;   selecting a secondary communication channel comprising the first communication channel or the second communication channel, the primary communication channel different than the secondary communication channel;   determining that a first energy level of the primary communication channel exceeds a threshold energy level;   after a backoff time period beginning after determining that the first energy level of the primary communication channel exceeds the threshold energy level, determining that a second energy level of the primary communication channel is below the threshold energy level;   identifying a transmission opportunity (TxOP) using the primary communication channel based on the determination that the second energy level of the primary communication channel is below the threshold energy level;   determining that a third energy level of the secondary communication channel is below the threshold energy level before the TxOP; and   accessing the primary communication channel and the secondary communication channel during the TxOP.   
     
     
         20 . The method of  claim 17 , further comprising:
 setting, based on a negotiation between the vehicle device and the second device, a first service period during which the vehicle device and the second device are to access the first communication channel and not access the second communication channel;   setting, based on the negotiation, a second service period during which the vehicle device and the second device are to access the second communication channel and not access the first communication channel;   sending a third PPDU during the first service period; and   sending a fourth PPDU during the second service period.